Hard Chemistry Chapter 01: Solutions Class 12 Level 4

यदि शून्य दशमलव आठ मोल विलेय को चार सौ ग्राम विलायक में घोला गया है, तो मोललता कितनी होगी?

If 0.8 mole solute is dissolved in 400 g solvent, what is the molality?

Explanation opens after your attempt
Correct Answer

D. 2 मोलल / 2 m

Step 1

Concept

400 g = 0.4 kg.

Step 2

Why this answer is correct

Molality = 0.8 ÷ 0.4 = 2 m.

Step 3

Exam Tip

In molality, convert solvent mass into kilograms. चरण 1: चार सौ ग्राम = शून्य दशमलव चार किलोग्राम। चरण 2: मोललता = शून्य दशमलव आठ ÷ शून्य दशमलव चार = दो मोलल। चरण 3: मोललता में विलायक के द्रव्यमान को किलोग्राम में बदलना जरूरी है।

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